Re: Re: 2m to 70cm upconverter design, any interrest ??

Hi Andy
If you've been thinking of making the move up to the 70 cm learning
someting more about RF in the UHF field with inexpencive construction
and using your old HF 10 meters equipments than the 70 cm transverter
described by Ed Krome, WA9LNV in QST august 1991 and september
1991 is a good way to do so.
Look at it in the QST cover
The above transverter with IF 28-30 MHz for in/out is designed to
be built dead-bug style on pieces of doubled-sided, unetched printed
circuit board and so no conventional PCB with striplines is required.
In addition inexpencive readily available MMIC and transistors are
used.
The above transverter is built in three different sections:
Xtal local oscillator
Receive converter
transmit converter
If one don't need it to receive than simply forget the receive converter
or vice versa
I am using it as a receiving converter and it works great.
To duplicate the above transverter is very easy because the Ed's article
explain everyting step by step and reading it is very informative.
If any one like a copy of the above article I can send it by email.
73" de
i8CVS Domenico
----- Original Message -----
From: "Andy Brian" <briaandy@gmail.com>
To: <amsat-bb@amsat.org>
Sent: Saturday, June 25, 2005 12:22 PM
Subject: [amsat-bb] Re: 2m to 70cm upconverter design, any interrest ??
> Hi,
>
>
> if you want to help with cheap and simple converter is the best choice to
> publish this converter in plain format for homebrewers etc. circuit
> diagrams and PCB at your homepages
>
> because the electronical elements is inexpensive in Asia and some others
> countries.
>
> This is my opinion, I know this is your hard job and you want to help us,
> but I think this converter won't bring you money for your job.
>
>
> best regards Andy
> > >>-----Original Message-----
> > >>From: William Leijenaar <pe1rah@yahoo.com>
> > >>Sent: Jun 23, 2005 3:08 PM
> > >>To: amsat-bb@AMSAT.Org
> > >>Subject: [amsat-bb] 2m to 70cm upconverter design, any interrest ??
> > >>
> > >>Hi AMSATs,
> > >>
> > >>To get on the 70cm HAMSAT uplink is not easy for many
> > >>hams in the world. FM handies are available, but other
> > >>modes than FM is very rare and to expensive for those
> > >>hams.
> > >>
> > >>To get them on 70cm ssb the best way is to use an
> > >>upconverter from their widely available HF. With use
> > >>of an upconverter an 10m ssb signal will be converted
> > >>into an 70cm ssb signal and can be used for HAMSATs
> > >>uplink.
> > >>With use of a 2m to HF down-converter the same HF can
> > >>be used for receiving the HAMSATs ssb downlink.
> > >>
> > >>I have been looking around the web to find available
> > >>converters. For 2m to 10m down-converters there are
> > >>several options, with good prices. Unfortunatly for
> > >>10m to 70cm up-converters there is very little
> > >>available and with high prices.
> > >>
> > >>Because of this I have been working on a cheap and
> > >>simpel to make design. After some weeks testing and
> > >>experimenting I got something on the test bench.
> > >>
> > >>The prototype can be seen on my webpage:
> > >>www.qsl.net/pe1rah/10m70cm.htm
> > >>
> > >>or via my main page:
> > >>www.qsl.net/pe1rah
> > >>
> > >>The features of the design are:
> > >>-------------------------------
> > >>* Made on a PCB
> > >>* In a metal box (74mm x 148mm x 30mm)
> > >>* 407MHz local oscillator build in
> > >>* 12Vdc power supply
> > >>* 50mW output on 70cm (enough to drive M57716 10W
> > >>power module)
> > >>* 28MHz BNC input, 70cm BNC output
> > >>* Unwanted suppression >40dB
> > >>* No exotic components
> > >>
> > >>When there is enough interrest I will deliver kits and
> > >>complete constructed converters.
> > >>
> > >>I can not deliver it for a price less than below:
> > >>-------------------------------------------------
> > >>Kits = 175 USD (+ shipping costs)
> > >>Complete build = 250 USD (+ shipping costs)
> > >>
> > >>!!! Please note that this is a complete TX
> > >>upconverter, included PCB, Crystal, metal box, BNC
> > >>connectors etc etc
> > >>!!! The only thing needed to be qrv on HAMSAT 70cm
> > >>uplink is a final amplifier.
> > >>!!! Best solution is a M57716 module that give 10W
> > >>output at the 50mW input.
> > >>
> > >>Let me know if there is any interrest,
> > >>
> > >>73,
> > >>William Leijenaar
> > >>PE1RAH
----
Sent via amsat-bb@amsat.org. Opinions expressed are those of the author.
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